Insulator support



July 14, 1925. I 1,546,213

R. E. DUFFY INSULATOH SUPPORT Filed Dec. 20 1923 2 Sheets-Sheet l 1 I i i l l I 1 .i l 1 1] i I I iwi g 71 {M BY July 14, 1925.

R. E. DUFFY INSULATOR SUPPORT 2 Sheets-Sheet 2 Filed Dec; 20, 1923 ATTORNIY Patented July 14, 1925.

UNITED STATES RALPH. EARLY DUFFY,

or CLINTON, urssouar.

INSULATOR SUPPORT.

Application filed December 20, 1923. Serial No- 681,888.

To all whom it may concern."

Be it known that I, RALPH E. DUFFY, a citizen of the United States, residing at Clinton,in the county of Henry and State of Missouri, have invented a new and useful Insulator Support, of which the following is a specification.

This invention relates to metallic insulator supports adapted to be used at the tops of poles in place of the usual cross arms. I

Some of the principal objects of the present invention'are to provide a. metal arm, or a series of arms, for this purpose arranged in such a manner that the greatest resistance is offered to strains caused by the weight of the conductor, and a large and ample bearing surface is brought into contact with the pole; to provide a metal arm in which no part of the metal is brought nearthe conductor to make a short path for the current to jump to the ground, and also making it practically impossible for squirrels, birds or the like to form a path between the conductor' and theground; to provide means for securely clamping a wooden insulator pin having a large base without causing undue decay of the wood at the point of attachment to the clamp; and

,to provide a metallic arm for clamping a wooden pin, and at the same time increasing" the distance between the conductor and the metal of the cross arm and eliminating the metal from the inside of the insulator, thereby greatly reducing the dielectrictension upon the insulator.

The objects and advantages of the invention will bevbetter understood fromthe' following detailed description taken in connection with the accompanying drawings, in which,

Figure 1 is a front elevation of the invention applied to the upper end of a pole.

Figure 2 is a side elevation thereof. Figure 3 is a plan view thereof," Figure 4' is a detail sectional view taken on the line 4-4 of Figure 1. y

Figure 5 is a detail view of one of the insulator pins. j

g-Figure 6 is a perspective view of one of the metallic elements forming apart of the invention. J v y Fi re 7 is a front elevation of a modified one of the invention. V

; As illustrated inthe drawings, the invenmembers 10' and 11, which are adapted to be secured to the;upper end of the pole at opposite sides thereof by bolts 13, or the like. These members may be in the form of channel bars, or they may have a circular cross section, or may be in any other form adapted for the purpose. As shown in Figure 1, the upper ends of the members 10 and 11 are bent inwardly above the top of the pole 12, as indicated at 14, and are adapted to receive between them a wooden insulator pin 15, which may be secured by a bolt 9. The lower ends of the members 1 and 11 are bent outwardly and upwardly,

PATENT OFFICE.

and also extend. upwardly a considerable distance above the lower parts 17 of the metallic members. The terminal clamping portions 16 are adapted to cooperate with the vertical upper end clamping portions 18 of outer metallic bars or members 19 and 20 to receive insulator pins 15, which may be secured by bolts 21. The bars 19 and 20 slope downwardly toward the pole 12,

and terminate in vertical portions 22, en-

gaging opposite sides of the pole, and secured thereto by one or more bolts 23.

In the adaptation of the invention, as shown in Figure 7, a pair of members 24 and 25, similarto the members 10 and 11, are secured in a similar manner to the upper ends of members 26 and 27 to receive insulator pins, in the same manner as shown in Figure 1. The lower ends of the members 26 and 27, however, instead of terminating in vertical portions which are secured to the pole, are continued to form outwardly and upwardly bent terminal portions 28, which cooperate with the upper ends of similar members 29 and 30. The lower ends of the last named members may also be continued to form outwardly and upwardly bent terminal portions 31,, which cooperate with the lowermost members 32 and 33, the latter being similar to themembers 19 and 20 of Figure 1. Thus, it will be seen that the members 26, 27, 29 and 30 ar shaped so as to format their upper ends the outer securing member for corresponding insulator pins, while. their lower ends form the inner securing members for other insulator pins. As many pairs 61? these intermediate members may as is nec essary icr the number efeonducmm which new be carried by $86 pole:

slope downwardly and. inwardly from the outer side of the insulator pin in a direction which is best adapted to resist the strains 3 caused by the weight of the conductor, Outward, as well as downward movement otthe insulator pin, is also resisted by the coop- V erat'i'ng inner clamping members. ,Th lats ter are also so shaped that the portion eiitending between thepin and theflpole is at a considerabledistance from the insulator, so as to prevent the current from jumping across the gap and also to prevent squirrels,1birds or th'ezilike from brldgihg forming "a path for the current between the i insulator-and groans; The formatioh of thb several .piii supporting members in se parateparts connected by a bolt. passing through the pin; makes it possible to use apihof larger size; and 'conse'quehtly stronger, without unduly-inci'easing the size of the vsupport. Anotheradvahtage of the inventionds'that where o-nly one conductor-isdesi redia-tfirst, 'it is only ne'cessaryjto use the members 11 and-20.; If it is desired later t'o'xadd :another conductor, :the *niembers v:10 "and 19 may be quickly attached merely by removing the-nuts from fthel bo'lts 13 and 23, respetively .l, This can be done without int'erruptin g the electric service on the first circuit; It will also be hoted that any number of circuits may be attached to the pole, using aoihinimiini nunib'er ofgstandardized parts. -Liliewisein the form showrtin Fig- "ure, 7; a single three wire ciruitc'niayfirst be supported by the members 25, 27, 30 and 1 and other suitable parts',-f'and later by removing the nuts frombolts l3- and '23 similar -membersfl; 26, 29 a'n-dx32 may be :addedto support another circuit. V

,1 The top pin 15', as shown in Figures 1 and 7 be used to carry a-rgrouiid wireor grounded conduct'oi' for protection "against lightning-,yand this"- pin may be i'na-de bf nietal instead 'ofwood; I

' f It;willabereadily-seen thativariousfdther modifications may be made in the si'Zejor shape of the 'severalparts of-thesuppor'ting devices, orii-n the manner in which they are Jarranged without departing from the salient ?'EGEItUfQS"Of the invention: It is desire, therefore; :to include all suchgmo'difi'at-ions 'as'may fall within the scope of the appended "claims l I 5 hat is chimed .lg qA-n insulatorfsupport', comprising a ifi'etalllcxbar secui'ab-l'eto a pole and having a terminal L portion spaced from ahd parallel tfo therpole towhichthe bar isseeured and, engageablefwith the inner vertical face o lj-an upright irrsulator :pin ja, second ine-. tallic bar securjable t' said p'ole and having a terminal portion engageable with the outer val-akin face of said era,- and means for securing. said terminal portions 1n supporting relation to said pin; 7

2. An insulator sapptrt, comprising a methe first, bar and having. a terminal portion engageable with the outer fac'ejif said pin,

and means for securing the pin between said terminal portions. or partially-bridging the gap and thereby .3; An insulator support, co'mprisi ng'a 1'11e tal-lic bar having a portion securable in ver 'tical position in engagement with "a; pole, and having a terminal portion'spaced from and parallel to the pole engaging portion andlengageableswith the inner vertical face of an upright insulator pin a. second metallic bar secur'able to said pole and having a. portion inclined upwardly and outwardly 'fi'om the'point of engagement with tlre p'ole, and terminating in a vertically upwardly extending portion engageable withthe outer vertical face of said pin.

. ;A i u t r p-Po ch.c mpr s g-a ITlQtallllC bar having a straight portion provided with means for securing it in vertical posit on in engagement with a pole, Qand tera e p n, a con me a l b i'V- vi a p rtib a p e qi e e'cu di i weffii f position below, the first bar and engagem n w t d poleand ha ng. ts iu ia'e -minating at its lower end in, as U-shaped r m h Poi t Of sasem etv t hii and terminating ina venticalupwardly eitending portionengageable with the outer ,face of said pin; and means for clan ping vsaid ,pin between the termina'l 'portions of outer vertical face of, an upright insulator pin, the lower 'eudof said ba-rjbeing continued to form a U-shaped portion the outer egi'of w h s d re ed lv rt 9a y=1lPWe y and spaced from thepole engaging portion, and pted to eng afge the inner vertical f t o Mathe up ght p i 6. An insulator support comprising a pair of similar metallic, members, with means 'for securing the same to the opposite sides of the pole, said members being extended vertically above the top of the pole and adapted to receive between them an upright insulator pin, which is secured thereto, the lower ends of said members being extended outwardly in opposite directions from the pole and engageable with the vertical inner faces of separate upright insulator pins, and outer clamping members also secured to the pole and havin vertical end portions cooperating with the lower ends of the first mentioned clamping members for holding said separate insulator pins in place.

7. An insulator support comprising two pairs of metallic members, said pairs being securable to a pole for fastening three upright insulator pins thereto, the inner pair of members having one of their ends extended vertically above the pole and holding between them one of said insulator pins, the lower ends of said inner pair being extended outwardly from the pole and cooperating with the upper ends of the other pair of members to individually clamp between them the other two insulator pins.

8. An insulator support comprising two pairs of cooperating members, said members being securable to a pole, one pair of said members being extended in opposite directions outwardl from the pole where secured thereto anti engaging one side of separate upright insulator pins, and the other pair being extended outwardly from the pole where secured thereto and cooperating with the first mentioned pair of members to hold the separate insulator pins in position.

9. An insulator support comprising two pairs of members, both pairs being securable to a pole, one pair having their lower ends bent outwardly and upwardly and terminating in vertical clamping portions, and the other pair extending upwardly and outwardly from the pole and also terminating in vertical clamping portions, the clamping portions of the two pairs cooperating to hold between them a pair of separate upright insulator pins.

10. An insulator support for holding pairs of insulator pins in spaced relation from a pole and in spaced relation to each other, comprising a plurality of pairs of members arranged in vertical order along the pole, each member having at opposite ends clamping portions for engaging opposite vertical faces of upright insulator pins, the lower clamping portion of an upper clamping member cooperating with the upper clamping portion of a lower clamping member to hold a pin in place.

In testimony, that I claim the foregoing as my own, I have hereto afiixed my signature.

RALPH EARLY DUFFY. 

